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HL: Fachverband Halbleiterphysik
HL 75: Poster IIIB
HL 75.12: Poster
Donnerstag, 19. März 2020, 15:00–17:30, P2/3OG
Cesium-Vapor-Based Delay of Single Photons Emitted by Deterministically Fabricated Quantum Dot Microlenses — •Lucas Bremer1, Sarah Fischbach1, Suk-In Park2, Sven Rodt1, Jin-Dong Song2, Tobias Heindel1, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany — 2Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
Controlling the propagation of single photons is highly relevant for the implementation of large-scale quantum networks. We report on the realization of a hybrid interconnection of a high-performance quantum dot (QD) microlens with hot cesium (Cs) vapor, allowing to control the time delay of the emitted photons [1]. The QD microlens with excellent optical properties was realized by a deterministic 3D in-situ electron beam lithography process [2]. By numerical simulations of the light-matter interaction in realistic QD-Cs vapor configurations, the influence of the Cs vapor temperature and the spectral QD-atom detuning is investigated in detail in order to maximize the achievable delay in experimental studies. Thus, our hybrid quantum system enables us to delay the emission pulses by up to (15.71 ± 0.01) ns for an effective Cs cell length of 150 mm.
[1] L. Bremer et al., Adv. Quantum Technol., 1900071 (2019).
[2] M. Gschrey et al., Appl. Phys. Lett. 102, 251113 (2013).